Granted Patent
Utility
US 6,317,401 · App. 08/407,058
Optical disk apparatus with optical head cleaning
Inventors:
Takashi Masaki, Shigenori Yanagi
Patented Case
View Patent ↗
Granted: Nov 13, 2001
Filed: Mar 17, 1995
Inventors
Takashi Masaki
Shigenori Yanagi
Assignee (at issue)
Fujitsu Limited
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.